Auto-partner HiFi Audio Amplifier Digital Bluetooth AMP RMS 70W+70W Channel 20 Inputs FM Radio AK55 Feature: Delivers Max Power 450W+450W (Totally 900W) to be used for multi-speaker 4-16 ohms impedance. It boasts roaring bass, crisp highs and an outstanding richness that most amps can only hint at. With high capacity transformer and premium processing chips, gives you HIFI sound effect. With 2 Mic jacks design, allows to experience more joyful karaoke for two. Independent control knobs allow to adjust the echo and delay effects of the microphone. Bluetooth 5.0 gives you a large operating range of 16.4FT/5M. Supports 3.5mm AUX, RCA & MIC Input, USB Port & FM Radio. UPGRADE version also supports OPT/COA input, let you experience karaoke or listen to great music whenever and wherever. In addition to being able to manually change the playing track and the total volume through the body panel, it is also equipped with remote control, more convenient to use. The LED display lets you see the settings you change easily. Supports DC 12V/5A or AC 110V-240V power input, can be used worldwide, suitable for a variety of occasions. With 70W2 Rated output power, supports speakers with 6-8 inch, can easily drive a variety of audio devices. NOTE: For optimal effect, the rated power of per speaker should not exceed 70W. Not a professional FM Radio, pls don't expect too much. more questions, pls contact us for help. For DC Power, pls use 12V/5A adapter. Only one power method can be used at any time ! Specification: Type: HIFI Power Amplifier Model: AK-55 Voltage: AC 110V~240V or DC 12V/5A Bluetooth: 5.0 Channel: 2.0 Rated Power: 70WX2 Max Power: 900W Rated frequency: 20-20KHZ Distortion rate: 5% S/N: 85db Impedance: 4-16 ohms Radio Frequency: 87.5-108MHZ Parameter: Audio Input: BT/USB/RCA/3.5MM/MIC/OPT/COA Audio Output: Wired speaker Jack U-disk supported formats: MP3 / APE / FLAC / WMA / WAV Max. capacity of U-disk: 64G Treble/Bass Control: Supported Power Supply: AC110~240V / 50-60Hz Packing weight: 1.1kg/2.43lb Package included: 1x Power Amplifier 1x Remote Control 1x Power Cable 1x Antenna 1x English Manual Note: The battery for remote is not included, Pls buy it yourself.